Extension-table lock



E. W. THORNTON.

EXTENSION TABLE LOCK.

APPLICATION FILED NOV. 19, 1918.

1,303,828, I V Patented May13,1919.

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EXTENSION-TABLE LocK;

To all whom it may concern:

Be it known that I, ELIZABETH W. THORN- TON, a citizen of the United States, residing at West Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Extension-Table Locks, of which the following is a specification.

This invention relates to looks for extension tables, and the object thereof is to provide a simple and eflicient device of this character so constructed as to prevent all possibility of the extra leaves working loose.

Another object is to provide a device of this character by which the frame members are locked in adjusted position to insure an even disposition of the leaves and prevent the collapse of the frame under a load.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

In the accompanying drawings Figure 1 represents a side elevation with parts broken out of a table equipped with this improved lock,

Fig. 2 is a top plan view showing several extra leaves in position with parts broken out to display the lock in operative position, and

Fig. 3 is a detail perspective view of the locking spring detached.

In the embodiment illustrated, a table T is shown having extension leaves L, three of which are shown in position in Fig. 2, although obviously any desired number may be employed.

Extension slides 1 and 2 which support the table leaves in the ordinary manner, are shown, said slides having transversely extending apertures 3, those in one being designed to register with those in the other for the insertion of a plug 4 which securely holds these members in adjusted position and prevents. collapse of the frame. This Specification of Letters Patent.

Patented iua is, 1919.

Application filed November 19, 1918. Serial No. 263,163.

plug 4 has a head 5 on its outer end against which is designed to bear one end of a leaf spring 6 as is shown clearly in Fig. 2. This spring 6 is apertured intermediately' of its ends to receive a securing screw 7 which passes into the slide member on which it is to be mounted. This platespring 6 has its rear end outwardly bowed as shown at 8 with its terminal bearing on the slide and its other end is also slightly bowed and has a disk-like head 9 adapted to bear on the head 5 of the plug 4: when in operative po sition to securely hold the plug against accidental detachment. This spring head 9 carries an actuating knob 10 to facilitate its movement, it being understood that when it is desired to remove the plug the knob is grasped and moved slightly outward and the spring swung on its pintle 7 which is formed by the bolt connecting it to the slide. After the plug has been placed through two of the registering apertures 3, the disk-like head 9 is swung over the head 5 of said plug as shown in Fig. 2 and securely holds the device in operative position.

It is to be understood that one of these springs 6 is to be employed for locking the slides which support each of the leaves L, although one only is shown in the drawings.

From the foregoing description, taken in connection with the accompanying drawings,

the advantages of the construction and of the method of operation will be readily apparent to those skilled in the art to which the invention appertains and while I have described the principle of operation of the invention together with the device which I now considerv to be the best embodiment thereof, I desire to have it understood that the device shown is merely illustrative and that such changes may be made as are within the scope of the claimed invention.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is:-

The combination with leaf supporting slides having registering apertures therein; of a removable plug for insertion through said apertures with an enlargement on its outer end to form a stop for limiting its insertion and an enlarged bearing surface,

a leaf spring secured intermediately of its In testimony whereof afiix my signature 7 ends to said slide with one end outwardly in presence of two Witnesses; 7

bowed and positioned to overlapthe head of i ELIZABETH W THORNTON 'said plug and the other end bowed outengaging head.

Wardly and its terminal engaging the slide, 1 Witnesses: and a knob on the outer face of said plug RoBT. V. MYERS, Sn,

V I MARY A. MYERs. Copies of. this patent may be obtainedfor five cents each, by ,egidressing the Commissioner of Patents.

' 'Wa hington, ]).G. r 

